File:Pacific service magazine (1918) (14783342995).jpg

Identifier: pacificservicema1019paci (find matches)
Title: Pacific service magazine
Year: 1912 (1910s)
Authors: Pacific Gas and Electric Company
Subjects: Pacific Gas and Electric Company Electric utilities Electrical engineering Public utilities
Publisher: San Francisco : Pacific Gas and Electric Company
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

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Fig. 3 Pacific Service Magazine 101 ing of Saverys engine in 1705 Papinturned his attention to improving it, anddevised a modified form, as shown in Fig. 5. The displacement chamber, A, was acvlinder with a floating diaphragm or
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Fig. 4 piston on the top of the w^ater to keepthe water and steam from direct contactwith one another. The water was de-livered into a closed air vessel, B, fromwhich it issued in almost a continuousstream against the vanes of a waterwheel.After the steam had done its work inthe displacementchamber it was al-low ed to escape through the cock, C, to the atmosphere.Papins engine was, in fact, a non-con-densing single-acting steam pump with steam cylinder and pump cylinder in one. A curious feature of it was the heater, D, a hot mass of metal placed in the dia- phragm or piston for the purpose ofkeeping the steam dry. Among the many inventions of Papinwas the boiler with an internal fire box,the earliest example of a constructionthat is now extensively used. About this time a new inventor ap-peared who made the piston engine apractical success by separating the boilerfrom the cylinder and by using, as Saveryhad done, artificial means to condense thesteam. This was Newcomen, who in 1705wi

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